Is it permissible to sing na'ts in the Musjid?

Answer

The singing of na'ts, nazams/ nasheeds in the Musaajid, is haraam. The Musaajid have been constructed and dedicated to Allah Ta'ala for the purpose of ibaadat. The Musjid is not a place for Satanism and nafsaaniyat. Singing of songs – even so-called 'religious' songs – on an organized basis to a crowd is haraam even if the concert is held in a private house.